The JBO Thread Ring Gauge (GO) - UNF - Right Hand - 3A - No. 1 x 72 is a precision GO gauge used to verify external threads to UNF standards. Sized No. 1 x 72 with right-hand threads and a 3A tolerance class, it’s ideal for inspectors, machinists, and workshop technicians who need quick, reliable conformance checks.

• Accurate UNF GO verification: Quickly checks external thread diameters against UNF GO standards to confirm proper size and fit, reducing guesswork and rework.
• Hardened steel construction: Built to withstand daily use on busy shop floors, delivering lasting durability and sustained accuracy over time.
• User-friendly inspection design: Intuitive geometry provides clear conformance cues, enabling fast pass/fail decisions and streamlined quality checks.

With its durable construction and precise dimensions, this gauge helps you verify threaded parts confidently, speed up QC workflows, and maintain consistent thread quality across batches. It supports reliable performance in precision machining, assembly, and maintenance tasks, giving your team a dependable tool you can trust.